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carbon-lang/toolchain/check/testdata/interface/local.carbon
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Richard Smith 05cc09daca Fix cross-package signature mismatches. (#7232) 
Fixes link failures when referencing a symbol involving a fingerprint
from a different package.

Previously we included the `Namespace`'s `import_id` as part of its
fingerprint, which caused local and imported namespaces to get different
fingerprints. We now store the `import_id` on the `NameScope` instead of
on the `Namespace` inst to avoid this problem.

Also, when we reach a package-level `NameScopeId`, consistently
fingerprint it as a (package name, library name) pair. Previously the
fingerprinting depended on whether it was imported or not, as an
imported `NameScopeId` had a parent scope (the current package). We need
to include the library name here so that private entities with the same
name in different libraries have different fingerprints.
2026-05-21 00:02:29 +00:00

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// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
// Exceptions. See /LICENSE for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
// INCLUDE-FILE: toolchain/testing/testdata/min_prelude/none.carbon
// TODO: Add ranges and switch to "--dump-sem-ir-ranges=only".
// EXTRA-ARGS: --dump-sem-ir-ranges=if-present
//
// AUTOUPDATE
// TIP: To test this file alone, run:
// TIP: bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/check/testdata/interface/local.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/interface/local.carbon
fn F() {
interface I {
fn G[self: Self]();
}
impl () as I {
fn G[unused self: Self]() {}
}
().(I.G)();
}
// CHECK:STDOUT: --- local.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %F.type: type = fn_type @F [concrete]
// CHECK:STDOUT: %empty_tuple.type: type = tuple_type () [concrete]
// CHECK:STDOUT: %F: %F.type = struct_value () [concrete]
// CHECK:STDOUT: %I.type: type = facet_type <@I> [concrete]
// CHECK:STDOUT: %Self: %I.type = symbolic_binding Self, 0 [symbolic]
// CHECK:STDOUT: %Self.as_type: type = facet_access_type %Self [symbolic]
// CHECK:STDOUT: %pattern_type.caf: type = pattern_type %Self.as_type [symbolic]
// CHECK:STDOUT: %I.WithSelf.G.type.1fa: type = fn_type @I.WithSelf.G, @I.WithSelf(%Self) [symbolic]
// CHECK:STDOUT: %I.WithSelf.G.8c1: %I.WithSelf.G.type.1fa = struct_value () [symbolic]
// CHECK:STDOUT: %I.assoc_type: type = assoc_entity_type @I [concrete]
// CHECK:STDOUT: %assoc0: %I.assoc_type = assoc_entity element0, @I.WithSelf.%I.WithSelf.G.decl [concrete]
// CHECK:STDOUT: %empty_tuple: %empty_tuple.type = tuple_value () [concrete]
// CHECK:STDOUT: %I.impl_witness: <witness> = impl_witness @empty_tuple.type.as.I.impl.%I.impl_witness_table [concrete]
// CHECK:STDOUT: %pattern_type.cb1: type = pattern_type %empty_tuple.type [concrete]
// CHECK:STDOUT: %empty_tuple.type.as.I.impl.G.type: type = fn_type @empty_tuple.type.as.I.impl.G [concrete]
// CHECK:STDOUT: %empty_tuple.type.as.I.impl.G: %empty_tuple.type.as.I.impl.G.type = struct_value () [concrete]
// CHECK:STDOUT: %I.facet: %I.type = facet_value %empty_tuple.type, (%I.impl_witness) [concrete]
// CHECK:STDOUT: %I.WithSelf.G.type.298: type = fn_type @I.WithSelf.G, @I.WithSelf(%I.facet) [concrete]
// CHECK:STDOUT: %I.WithSelf.G.efd: %I.WithSelf.G.type.298 = struct_value () [concrete]
// CHECK:STDOUT: %.f9d: type = fn_type_with_self_type %I.WithSelf.G.type.298, %I.facet [concrete]
// CHECK:STDOUT: %empty_tuple.type.as.I.impl.G.bound: <bound method> = bound_method %empty_tuple, %empty_tuple.type.as.I.impl.G [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: package: <namespace> = namespace [concrete] {
// CHECK:STDOUT: .F = %F.decl
// CHECK:STDOUT: }
// CHECK:STDOUT: %F.decl: %F.type = fn_decl @F [concrete = constants.%F] {} {}
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: interface @I {
// CHECK:STDOUT: %Self: %I.type = symbolic_binding Self, 0 [symbolic = constants.%Self]
// CHECK:STDOUT: %I.WithSelf.decl = interface_with_self_decl @I [concrete]
// CHECK:STDOUT:
// CHECK:STDOUT: !with Self:
// CHECK:STDOUT: %I.WithSelf.G.decl: @I.WithSelf.%I.WithSelf.G.type (%I.WithSelf.G.type.1fa) = fn_decl @I.WithSelf.G [symbolic = @I.WithSelf.%I.WithSelf.G (constants.%I.WithSelf.G.8c1)] {
// CHECK:STDOUT: %self.param_patt: @I.WithSelf.G.%pattern_type (%pattern_type.caf) = value_param_pattern [concrete]
// CHECK:STDOUT: %self.patt: @I.WithSelf.G.%pattern_type (%pattern_type.caf) = at_binding_pattern self, %self.param_patt [concrete]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %self.param: @I.WithSelf.G.%Self.as_type.loc17_16.1 (%Self.as_type) = value_param call_param0
// CHECK:STDOUT: %.loc17_16.1: type = splice_block %.loc17_16.2 [symbolic = %Self.as_type.loc17_16.1 (constants.%Self.as_type)] {
// CHECK:STDOUT: %Self.ref: %I.type = name_ref Self, @I.%Self [symbolic = %Self (constants.%Self)]
// CHECK:STDOUT: %Self.as_type.loc17_16.2: type = facet_access_type %Self.ref [symbolic = %Self.as_type.loc17_16.1 (constants.%Self.as_type)]
// CHECK:STDOUT: %.loc17_16.2: type = converted %Self.ref, %Self.as_type.loc17_16.2 [symbolic = %Self.as_type.loc17_16.1 (constants.%Self.as_type)]
// CHECK:STDOUT: }
// CHECK:STDOUT: %self: @I.WithSelf.G.%Self.as_type.loc17_16.1 (%Self.as_type) = value_binding self, %self.param
// CHECK:STDOUT: }
// CHECK:STDOUT: %assoc0: %I.assoc_type = assoc_entity element0, %I.WithSelf.G.decl [concrete = constants.%assoc0]
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT: .Self = %Self
// CHECK:STDOUT: .G = @I.WithSelf.%assoc0
// CHECK:STDOUT: witness = (@I.WithSelf.%I.WithSelf.G.decl)
// CHECK:STDOUT:
// CHECK:STDOUT: !requires:
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: impl @empty_tuple.type.as.I.impl: %.loc19_9.2 as %I.ref {
// CHECK:STDOUT: %empty_tuple.type.as.I.impl.G.decl: %empty_tuple.type.as.I.impl.G.type = fn_decl @empty_tuple.type.as.I.impl.G [concrete = constants.%empty_tuple.type.as.I.impl.G] {
// CHECK:STDOUT: %self.param_patt: %pattern_type.cb1 = value_param_pattern [concrete]
// CHECK:STDOUT: %self.patt: %pattern_type.cb1 = at_binding_pattern self, %self.param_patt [concrete]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %self.param: %empty_tuple.type = value_param call_param0
// CHECK:STDOUT: %Self.ref: type = name_ref Self, @empty_tuple.type.as.I.impl.%.loc19_9.2 [concrete = constants.%empty_tuple.type]
// CHECK:STDOUT: %self: %empty_tuple.type = value_binding self, %self.param
// CHECK:STDOUT: }
// CHECK:STDOUT: %I.impl_witness_table = impl_witness_table (%empty_tuple.type.as.I.impl.G.decl), @empty_tuple.type.as.I.impl [concrete]
// CHECK:STDOUT: %I.impl_witness: <witness> = impl_witness %I.impl_witness_table [concrete = constants.%I.impl_witness]
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT: .G = %empty_tuple.type.as.I.impl.G.decl
// CHECK:STDOUT: extend %I.ref
// CHECK:STDOUT: witness = %I.impl_witness
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @F() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %I.decl: type = interface_decl @I [concrete = constants.%I.type] {} {}
// CHECK:STDOUT: impl_decl @empty_tuple.type.as.I.impl [concrete] {} {
// CHECK:STDOUT: %.loc19_9.1: %empty_tuple.type = tuple_literal () [concrete = constants.%empty_tuple]
// CHECK:STDOUT: %.loc19_9.2: type = converted %.loc19_9.1, constants.%empty_tuple.type [concrete = constants.%empty_tuple.type]
// CHECK:STDOUT: %I.ref: type = name_ref I, @F.%I.decl [concrete = constants.%I.type]
// CHECK:STDOUT: }
// CHECK:STDOUT: %.loc22_4.1: %empty_tuple.type = tuple_literal () [concrete = constants.%empty_tuple]
// CHECK:STDOUT: %I.ref: type = name_ref I, %I.decl [concrete = constants.%I.type]
// CHECK:STDOUT: %G.ref: %I.assoc_type = name_ref G, @I.WithSelf.%assoc0 [concrete = constants.%assoc0]
// CHECK:STDOUT: %impl.elem0: %.f9d = impl_witness_access constants.%I.impl_witness, element0 [concrete = constants.%empty_tuple.type.as.I.impl.G]
// CHECK:STDOUT: %bound_method: <bound method> = bound_method %.loc22_4.1, %impl.elem0 [concrete = constants.%empty_tuple.type.as.I.impl.G.bound]
// CHECK:STDOUT: %empty_tuple: %empty_tuple.type = tuple_value () [concrete = constants.%empty_tuple]
// CHECK:STDOUT: %.loc22_4.2: %empty_tuple.type = converted %.loc22_4.1, %empty_tuple [concrete = constants.%empty_tuple]
// CHECK:STDOUT: %empty_tuple.type.as.I.impl.G.call: init %empty_tuple.type = call %bound_method(%.loc22_4.2)
// CHECK:STDOUT: return
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: generic fn @I.WithSelf.G(@I.%Self: %I.type) {
// CHECK:STDOUT: %Self: %I.type = symbolic_binding Self, 0 [symbolic = %Self (constants.%Self)]
// CHECK:STDOUT: %Self.as_type.loc17_16.1: type = facet_access_type %Self [symbolic = %Self.as_type.loc17_16.1 (constants.%Self.as_type)]
// CHECK:STDOUT: %pattern_type: type = pattern_type %Self.as_type.loc17_16.1 [symbolic = %pattern_type (constants.%pattern_type.caf)]
// CHECK:STDOUT:
// CHECK:STDOUT: fn(%self.param: @I.WithSelf.G.%Self.as_type.loc17_16.1 (%Self.as_type));
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @empty_tuple.type.as.I.impl.G(%self.param: %empty_tuple.type) {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: return
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @I.WithSelf(constants.%Self) {
// CHECK:STDOUT: !definition:
// CHECK:STDOUT: %Self => constants.%Self
// CHECK:STDOUT: %I.WithSelf.G.type => constants.%I.WithSelf.G.type.1fa
// CHECK:STDOUT: %I.WithSelf.G => constants.%I.WithSelf.G.8c1
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @I.WithSelf.G(constants.%Self) {
// CHECK:STDOUT: %Self => constants.%Self
// CHECK:STDOUT: %Self.as_type.loc17_16.1 => constants.%Self.as_type
// CHECK:STDOUT: %pattern_type => constants.%pattern_type.caf
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @I.WithSelf(constants.%I.facet) {
// CHECK:STDOUT: !definition:
// CHECK:STDOUT: %Self => constants.%I.facet
// CHECK:STDOUT: %I.WithSelf.G.type => constants.%I.WithSelf.G.type.298
// CHECK:STDOUT: %I.WithSelf.G => constants.%I.WithSelf.G.efd
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @I.WithSelf.G(constants.%I.facet) {
// CHECK:STDOUT: %Self => constants.%I.facet
// CHECK:STDOUT: %Self.as_type.loc17_16.1 => constants.%empty_tuple.type
// CHECK:STDOUT: %pattern_type => constants.%pattern_type.cb1
// CHECK:STDOUT: }
// CHECK:STDOUT:
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